A decade ago, two massive young stellar objects (MYSOs), S255IR NIRS3 and NGC6334I-MM1, coincidentally began their accretion bursts simultaneously. Both events were heralded by giant flares of 6.7 GHz methanol masers. We verified the NIRS3 burst using near-infrared imaging and determined initial burst parameters mainly from SOFIA data. This facility was used by us to monitor the change of the dust continuum emission over a period of nearly seven years. We provide a summary of the burst history and present revised parameters. Although our time-dependent radiative transfer modeling is still ongoing, substantial features are already being successfully reproduced. This holds in particular for the time lag of the emission at various wavelengths. Notably, there is evidence that the burst did not propagate spherically and might have left a permanent impact on its environment. This suggests that the surrounding dust distribution is more complex than the canonical disk/envelope configuration.
